OSRIC - Old School Reference and Index Compilation
Doesn't sound all that sexy when you actually break it down, does it? Well, it wasn't supposed to.
OSRIC was initially envisioned as a safe harbor for publishers that wanted to post "old school adventures." As it was a reimagining of AD&D 1e, it would allow publishers to use it as a reference for their "old school adventures", without stepping on the toes of WotC and falling back directly on Wizard's 1e IP.
It's was officially released 1/20/07 (with a preview that had released on 6/23/06)
OSRIC v2, which is the version one is most like to encounter online (or at Lulu) is written with the idea of actually being used as a reference in play, whereas OSRIC v1 was written with the idea of it being used as a reference for published material. OSRIC v2.2 is the latest version available.
It includes the usual AD&D 1e classes with the exception of the Bard (who never fit in the first place system wise) and the Monk (who was usually out of sorts setting wise). Strangely enough, Swords & Wizardry Complete includes the Monk but drops the Illusionist. Just an observation.
OSRIC is the 1e Player's Handbook, Dungeon Master's Guide and Monster Manual rolled into one comprehensive volume. Even if you still like running with your original 1e rules, having OSRIC as an additional reference at the table doesn't hurt.
It drops Weapon Speed (which I don't recall ever being in a group that used the rule, let alone understood it.) It retains segments as a time measurement in combat and spell interruption if hit while casting.
OSRIC plays close enough to AD&D 1e that I was able to run a campaign with both 1e books and OSRIC being used at the table interchangeably. Sure, the experience point tables are tweaked a bit to change the math, but all in all, it is simply a much easier to read and understand rewrite of the original AD&D 1e rules.
Some history about the Why's and Wherefore's OSRIC (as supplied by +Guy Fullerton )
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